One memorable June day in 1972 the lives of three young divers, one Norwegian, the other two Swedes, were changed forever.

On the sea floor, off the rocky island of Runde on Norway's west coast, the three men discovered one of the world's greatest lost hoards of gold and silver coins. But, treasure trove or not, their find involved them in prolonged wrangling over ownership of the coins with Norwegian government authorities and The Netherlands.

In 2011, nearly forty years after their momentous discovery, the divers were reunited on Runde.

The coins were from the hold of an East Indies-bound Dutch merchantman, the Akerendam, which in 1725, while working its way through the English Channel in an endeavour to evade pirates, was overwhelmed by a violent storm and driven north, only to be wrecked off the coast of Runde, a noted bird rock. In the hold of this ill-starred ship were no fewer than 19 chests crammed with gold and silver coins. Five chests were salvaged at the time, but it was not until 1972 that the three divers found what was left of the wreck. They recovered a further six chests, containing 60,000 gold and silver coins - and it is believed that there are still some eight more packed chests somewhere on the seabed, awaiting some lucky finder